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A diagonal matrix whose diagonal entries are all equal is called:
AZero type
BScalar
CIdentity
DRow type
Answer & Solution
Correct answer: B. Scalar
1. Off the diagonal every entry is zero.
2. On the diagonal the entries all match.
3. Such a matrix is a scalar matrix.
_Source: NCERT Class 12 Mathematics Part I, Chapter 3, Matrices._
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